Outboard vs inboard3/31/2023 the reason why many top teams use a cantilevered, rectangular tubing WCD is not just because of the advantages pointed out in this and the previous post, but because these teams have done it year, after year, after year, and can build one relatively quickly without issue. Overall, if you are looking at what kind of chassis to use this season, my recommendation is to go with what you are most comfortable with using, and what will cause you little to no headaches. However, if you are looking at comparing purely the KOP to a traditional, cantilevered WCD, then that a whole other ballgame, and is explained pretty well by post. On the other hand, cantilevered WCD’s are almost always made of rectangular tubing, is very simple, and can be made using a manual mill (you might be able to get away with a drill press and a jig, but milling is preferred). many of these drive trains use CNC machinery, including CNC press breaks, because these parts need to be very accurate if they are bending them to put together, like how the KOP chassis is. However, the hard part is that generally, parallel plate style drivetrains are much harder to machine, and more complex to design. also, depending on the construction method, it can be lighter than WCD (I have no idea what the weight of 971’s 2016 chassis was, but it looked real light. generally, parallel plate style drivetrains are better, since they are able to support both sides of the axle, and therefore balance the load of the wheel better. WCD is generally defined as a traction drivetrain with the center wheel dropped.Ĭorrect me if I’m wrong but the question here seems to be more of a debate between parallel plate/clamshell drivetrains (one plate on each side of the wheel, 971 2016, 610 2013) versus cantilevered drivetrains (the outboard one referenced). I seemed to have interpreted the question differently.įirst off: both examples are WCD. If you google “West Coast Drive vs Kit of Parts Frame” you will find numerous threads discussing the advantages and disadvantages of each. In the end a WCD offers greater customizability over a standard KOP frame. The other thing is that a WCD is not necessarily smaller, you can make it larger or smaller depending how you want. If your team already opted out of the KOP frame, you might as well go for a WCD otherwise it would be better to stick with a KOP frame. ![]() If you are comfortable with a WCD, by all means go for it. ![]() In the end it really depends what your team can do better. It’s a tried and tested solution that works for the majority of teams.ĭepending on how you approach your frame design, a WCD can be lighter than a KOP frame or vice versa. The benefit of the KOP frame is that it works. You are able to customize to a greater degree your wheel size, wheel type, number of wheels. The benefit of a WCD as far as I know, is that it allows greater customizability as you can really design the frame for how you want to design your robot. ![]() The second type which your team developed is known as a west coast drive or WCD for short. I think first you should know that the first type of design is the Kit of Parts Frame, also part of the AndyMark AM14U series.
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